I have a Eurocom X4C (Clevo P751TM1-G) that i bought a few month to replace an Eurocom P5 Pro that died.

I had to enable SecureBoot with custom keys (PK/KEK/DB) for my linux work OS.
I entered the BIOS/UEFI , enabled those options and configured as well the User password.
After reboot i only get a black screen.

After some times i realized that the system still somehow tries to boot and some clevo related options like FN+1 enables the fans... but with a permanent black screen on main and external panel.

Yesterday support sent me the update zip that they are using. for updating from wwindows there is a file BIOS.ROM in it of 8Mb, i opened it with UEFITOOL and it looks like a legit BIOS DUMP.
However all their laptop i had so far had 2 chip, a 8 MB an a 4MB, not sure about this one

However on the phone another technician told me that this approach cant be done as the File is encrypted and edited on the fly before being flashed ...
I played a bit with coreboot on my server board and several lenovo laptops an never heard of that.

I m just hoping that i did not enter an infinite administrative maze that will last for weeks.
So far the technician i had where really nice so i hope for the best

Edit : I guess flashing is not possible due to Bootguard protection from Intel actually ;(